I'll bet you could offset any savings in gasoline costs looking for a better price.
The 617P is another example of a gun where the demand is way ahead of the production. The Bud's price on the gun, new, posted above is less than what some of the used ones are selling for. Aside from certain cosmetic concerns, the internal lock is not a problem for a recreational firearm especially.
Smith & Wesson 617 Plus 6 in Bbl Revolver in .22, Long Rifle. Bluebook of Gun Values (32nd Edition) indicates between $326 in 95% condition and $631 in 100% condition for this gun. I have 54 recorded prices for this model gun from $350 to $760 over a period of 7 Yrs 6 Mos ending March 14, 2011. The average price as of that date was $495. No refurbs, no refinishes, regular sights. All represented as 95% or better. No distinction for engineering revision, if any, no special editions, no distinctions for box, papers, tools. Current or last MSRP is $940.
Here's how that data charts out. Keep in mind the Trendlines represent averages. Better examples of the gun would command higher prices, especially with box, papers, tools, and so forth.