Best place other than eBay to sell HO cars and buildings.

The best place is ebay. I have sold many HO and O scale items over the years and still do. Remember you reach millions of potential buyers.

There are HO forums that have buy/sell boards, try them but I never had any luck with them.

Dave

If you have a buddy who DOES sell at local train shows, perhaps you could work out a shared deal for his help.

Re alternative selling thoughts for HO...

Ebay, like it or not, is you widest geographical exposure for sales.  However, as with all the gauges, kit-builders are a declining segment of the hobby.  Ready-to-run...and all the associated monikers...is the growing segment.  For names...Athearn, Woodland Scenics, Evergreen, Faller, etc....that are yet producing, I wouldn't expect to get more than 50% of the selling price...if that.  Some kit producers, like Scale Structures Limited, may have a reduced product line, discontinued structure kits, which may do better on the broad market.

Really old HO...40 years or more vintage...is tougher because technologies of mechanisms/controls, manufacturing processes, materials, etc. have changed so much (for the better), and the market has responded accordingly.  Example: wood structure kits formerly made using die-cut sheet wood pieces requiring finagled final fits versus laser-cut walls and details that fit precisely....no fussiness.

Track?....  Old brass rail track?  The industry has given up on brass rail track for all but outdoor usage due to its oxidation problems requiring frequent maintenance.  Those wishing to maintain consistency as they expand their brass-railed empire are getting fewer and fewer. 

Re HO freight car kits...If they are old enough to have the NMRA couplers rather than knuckle couplers compatible with the de facto standard, Kadee, will be further depreciated.  Ditto wheel/axles....Metal wheels are now preferred, plastic wheels pre-dating the NMRA RP-25 wheel contour are typically destined for the trash/recycle heap.....further depreciation.

Bundling is often required to get rid of the really common or less desirable items.  IOW, put it into a miscellany pile, gird your loins, grit your teeth, and price the lot to SELL. 

I dunno...  You'll probably get lots of opinions/suggestions.  My wife has been helping our (LHS) customers who have trains estates to sell on Ebay for more than 15 years.  The above comments are but a small summary of her experience in using that venue to sell HO collections. 

FWIW....

KD

Thanks ladies and gents.  These aren't collectors trains and there are no locos so there isn't an electronics improvement.

Most of these are brands that are currently in production.   Lots of city buildings. freight cars, tractor trailers and a dozen or so packs of Kadee #5s.  

I guess the best way to sum them up is that oher than blue box Athearn cars, all of the rest are scale model train layout quality not Tyco/AHM stuff (which is indeed fun!). 

I will have to inventory and then probably throw them on ebay since I'm in O scale for the long haul.

How many packs of Kadee #5 do you have.

It seems people like almost anything once it becomes a bit difficult to get.
I don't know that they are paying a premium (probably not), but in my area, unbuilt blue box Athearn kits are popular.
The problem with selling them individually would be the shipping.

Sorry, but if it were me, I'd turn the whole shebang over to a "pro" eBay seller and retain 60% of their efforts.

Another thought or two:

Some time back I had a fair number of new, old stock (unbuilt) Faller HO building kits. Mine were probably from the 1960's, maybe older. After selling a bunch locally for $5.00 each, I put some on EBay. Much to my surprise, several received international bids, and one went for something like forty dollars. One never knows.

If you don't want to sell on EBay or at local shows, How about selling them to your local hobby shop, or someone local who buys and sells trains?
The train stores in my area sell used trains.

IMHO, one of the challenges in selling unbuilt kits is buyer confidence that the kits are complete.

Ebay is a grind, but it works for me, albeit only a few pieces at a time. 

I've had some luck selling some train items locally on craigslist.  Nothing big, not a lot, and didn't get rich, but simply got rid of some unwanted stuff just sitting around and otherwise collecting dust.

You might try advertising a few small lots of various items.  Whether it sells or not, you ain't out anything to list on c.l.

I am interested in the kadee #5 couplers and any blue box kits with 40' box cars or tank cars. Don't care about roadnames.