I assumed your set was later on the grounds of their appearance, and because I once had a "vase" - exactly the same as one of your tumblers. I can't remember anything about ground or heat-finished rims!
(I haven't re-read the big thread)
If you have a search on ebay in finished listings, you might get some idea of the prices they go for, or see if there are any listed and see what they go for. Values are very subjective, we don't really tend to discuss them here. Something is worth what somebody is willing to pay for it in that place, at that time.