Some hobby shops neither ask for a deposit 'up front' nor debit your credit card until they receive the product and are ready to ship it to the customer. (All the info they need such as name, cc # and expiry date, shipping address etc.) has already been obtained at the pre-order stage)
Exactly.
Read the c h u n k of words below for my somewhat-related ramble that wanders a bit beyond the thread...
In my experience, low volume dealers are those who tend to require a deposit. The high volume guys like Charles Ro Supply Co. (CRSC) operate in a manner that's much more pleasurable (if parting with your cash for something that's a "want" rather than a "need" is pleasant). This holds true when orders are made to gain a Lionel product. For me, (and everyone else) CRSC has authorized a return label, substituted a new replacement, and returned my order in almost less time than I've been "on hold" with Lionel. OK, kidding aside, Lionel has always come through (for me)-- at least before the next seasonal change is noticed in the atmosphere. When pre-ordering from Golden Gate Depot-- the process is different-- a lot different. (No explanation to be made here.)
I feel that the BIG deal about pre-orders is the uncertain nature of what the product will actually "be" when delivered. If the engine you're ordering has already been manufactured in the past and have seen it (or own one) from its previous run (without the additional upgrades in the new version)-- you'll be aware of what to expect in the new delivery. Otherwise, paint color, finish, road name front face and size, details, and coupler design can be unknowns just to name a few. In contrast, those who are preordering a Strasburg No. 90 Locomotive from Lionel that have viewed the brief promo video within the online catalog and have also watched the hour+ "Special" on YouTube will know what to expect.
I don't preorder unless the item is a Special Run (limited to a few pieces) made by a LHS owner partnering with Lionel that's not available anywhere else-- including Lionel. The important part for me is that the item will be in harmony with the era and Railroad I model. While reviewing an awaited new catalog and not discovering a particular road name offered on let's say a Ten Wheeler, but a Model Railroad Type Person may settle on getting a 4-6-0 that has an attractive appearance. Not me-- unless I know an accurate set of decals are available and I'm up for re-painting.
Furthermore, I am v e r y, very far from being like some of my friends who do not include anything on their layout unless it was rostered in the specific year they model (including passenger Train consists and the number of hoppers overall that served branch line mines). They wouldn't think twice about removing marker lights on a locomotive to be replaced with a prototypical brass casting mounted in the correct place.
Do whatever makes your model Train hobby fun for you-- including preordering.