I play with older tools a lot myself. Personally, I would max out in the $35 range, just because it's a "no-name" vintage tool. The feed handle has been replaced with what looks like part of a screw driver, and the missing step pulley is a negative. The problem with step pulleys is that you not only kind of what the match in diameter, but in stack height. Sometimes, you can not exactly match them. Granted, it's a minor thing, and I hardly ever change speed on my Walker Turner. (Though, I can't wait to finish my Rockwell VS drill!)
IMHO, I would hold out for a nicer Craftsman or better name brand bench top in the $50 to $75 range. Lot's of nice Delta's and Craftsmans out there.
As for quill slop, unless it's real bad, it's not a big deal... it will probably be tighter than some junk today. (I can say this after buying two new Craftsman ones that had so much slop it was not funny. One 12" press had the laser, with the laser on. I could move the bit 1/2" (1/4" per side of the line) and this was BRAND NEW...