They are ok for the money. Don't expect anything spectacular.
Current prices are garbage right now because half the universe is trying to cancel Russia.
I paid less than $100 each for mine new.
The variety of whats available is staggering. Several different case styles and sizes are available.
The two most common ones are the Amphibia and the Komandirskie.
Amphibia is the automatic winder Diver and the Komandirskie is the manual field style.
Factory straps are shit & the bracelets are not much better.
Expect +\- up to a min a day.
Don't confuse Vostok & Vostok Europe, They are related but separate companies.
I've always got mine from eBay but be careful if you order one.
I recommend NOT buying anything marked custom. Those are almost always Frankenstein parts watches.
Amphibia "scuba dude" is the most common.
Seiko 5 series is probably a better intro to mechanical watches but are kinda boring when you compare them.
View attachment 62481
Amphibia on the left Komandirskie on the right.
I can try to answer any other questions but i'm no expert.
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Ralfakick