We just had this conversation in another thread.
Yes, there is something of a collector market for vintage jacks, but it is a very narrow market niche.
Every American automobile produced (up until recently) came with a jack.
Additionally, there have been a number of automotive jack manufacturers in country since the early 1900s.
Ergo: the market is somewhat glutted.
There are a number of "Jack" threads here - if you use the "search" function and search "Jack" (by title only) you will get no fewer than eighteen pages of search results.