It depends... You need to know that people on ebay post **** incorrectly in wrong category, don't include model numbers etc. I almost got a brand new g80-8113HPBUS a few weeks ago, but got outbid at the very last possible second with an end price of $37. You can still find 11900 or 1800 lately with doubleshots for pretty cheap, or various g81s.
Cherry keys are the **** for sure. Too bad only a very few models were made with 1.25 modifers and centered caps lock in doubleshots, and they are so much harder to find.
To OP, if you want to improve typing blanks can be helpful. Otherwise it's all for looks, so just get whatever you like most.