I'm the Wiz, and nobody beats me!
I feel that the value of any vintage bicycle is subjective. Your bike is most likely a '67 model, having a Sprint chainring and a guard. The Violet paint is hard to find and could add some value here, as well as the Sprint derailleurs. Closer pictures will show the condition better and help to determine value. I searched high and low for a Violet Varsity, eventually buying one I had owned back from a fellow collector. I paid 500.00 for mine and considered it a gift, factoring in the condition, a Miller generator set, touring pedals and n.o.s. Schwinn whitewall Sports Touring tires. it was a buddy deal, for sure! It would be nice to see your bike cleaned and detailed. I'm not a fan of messing with originality or decals, but that downtube decal is being reproduced. Oh, by the way, welcome to the C.A.B.E.
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You have some of the nicest lightweight examples I've ever come across. The early down tube shifter years are my favorite and have at least one example for each year minus a 1960. Schwinn made minor detail changes on every single year in the Sprint era and it's pretty easy to tell them from one year to the next if you know all the little details. The down tube shifter was moved to the stem on the 1967 models and the 1967 seats on the Tourist models were color matching and no longer black. The chain guard was issued on all the 1967 models but the 1966 pieces were not spec'd with a chain guard. I have seen quite a few 1966 models with the chain guard and I known that Schwinn could very well have added that "safety" component on the very late 1966 production, this type of thing has happened numerous times and on different models with the late production showing up with a new component that was standard issue on the next years models. If the OP's piece is a 67 it would for sure have stem mounted shifters.
Just a note. The seat post decal had a change around this time with a name change. The early ones had Arnold Schwinn printed on them and Arnold was deleted on the later issues.