Hey Mary,
While there is no substitute for seeing & driving the car first hand, and/or having a mechanic check it out first, unless there are serious miles on it, not much can be wrong...it is a VW.
Having said that there are a lot of quality control gremlins that can raise their pesty little heads, mostly to do with switches, wiring and being under-fused. Those have been the cheapest of the fixes I have done to my Vintage speedster...a year old or more when I bought it, not optioned up as much as the one on eBay you've pointed out...and I paid $17,500.
I don't know where some of the boyzzz get their idea of pricing, but were you to buy new, you'd spend $24K plus I imagine. Vintage, with all its flaws and warts builds the most replicas and the chances of getting a real lemon is slim IMHO. If you really covet a speedster replica, and plan to drive it at least two to three years, I'd guesstimate $20K-21K would be a value and a miles per dollar smile factor you could live with...
There are few, if any changes in manufacturing from year to year, the biggest bug-a-boo is who built his engine. Ask the seller for delivery date details and then call Kirk and tell him you are looking at a year young resale. Ask for the engine's history and ask because the car is still so near new, what sort of support he can offer you...He has been very good to many of the owners on this site, in fact, the three main car builders seem to go out of their way to be helpful...and that's not to knock the guys who have entered and re-entered the biz lately, it's just that they haven't got as much product on the ground.
Good luck