I have never heard of a Westside NYC 4-8-2.
Westside imported stuff by a lot of builders and it is all over the map in quality etc.
US Hobbies was the exclusive importer of KTM built models. KTM was considered the best of the Japanese Model Mfg for O scale at the time, late 70s or early 80s. When the owner of US Hobbies died, Westside picked up the contracts that were Pending for US Hobbies at the time. I purchased a PRR 4-8-2 that was imported by Westside and built by KTM. It is a very nice well built and well running model.
I have older KTM stuff under the US Hobbies brand that are also well built and good running.
I consider the KTM models still the best the value for locos to run on a layout. They have a great deal of detail, but not as much as newer PSC and OMI etc. They are sturdy and the mechanisms are great in my opinion.
Original price means nothing for a model that old. It probably sold for 5-600 maybe. but the condition of the model today and the rarity will dictate the price. the more and unique and popular, the higher the price. PRR models tend to be a little cheaper because there many made. NYC was very popular for years and commanded higher prices, but in recent years they seem to have been showing up on tables at train shows in higher numbers and lower prices.