The GI Parkerized 5" MSRP is around $700. The budsgunshop price is about $575. A fair price that I would offer a gunstore (this is saying they aren't flying off shelves like crack laced hotcakes) would be between the buds price and the "shipped to me and FFL charges" price of $610 + Tax.

If the gun you want has been sitting there for a couple months and isn't a showcase item OR they've been selling so many that the manufacturer has given them special discount (most service pistols fall into those categories) you should never pay more than the budsgunshop.com price + shipping + FFL charges. Why? Because if you can wait two days that is the price you would pay if you bought it from Buds.

If you have to have it right now and you're not willing to walk out without it then you have much less buying power.