How much is the seller asking? Private or gun shop? Figgure a minimum for $450 on a private sale for any clean S&W pre-lock, then start adding $$ from there.
Dealer shop add $100
Pawn shop add at least $100
Box adds $
Tools $
Paperwork $
Main $$ factor would be condition. And your desire to have it.
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ETA: check Gunbroker, search for Smith 34 and there are several listed today. Some of them are $$$ and selling. John
I'm not an expert on the .22's.
I do have a Model 18-3 and it is an excellent gun, with original blue cardboard box and tools, I paid $600 for it early last year.