If you plan on buying the 219 from Banjo Depot-I mean Guitar Center, keep in mind it's a crapshoot you'll get one that sounds good AND is well built. Unless you know what to listen for,
and to be really safe, are competent at opening the thing up,
you're better off getting one of the many other alternative choices on the market, including simply just another SM57.
Since they sound "like" a Sennheiser 421, in the long run you'd be better off getting a real 421 as their quality control buries Oktava's-if that's the sound you want.
You can get two Shure's in the same family as the SM57, in the
545 series, which usually can be picked up for $50 or less in good (or better) condition at somewhere like e-bay.
They are just as "good" with a (very) slightly different response.
Chris
P.S. I was planning on putting one of my (mint) SM57's up for sale
in the "for sale" section of this BBS soon for $50 +shipping
costs and insurance (your choice of shipping service).
Private message me for more details, within the next 48
hours, if you'd like to have the first shot at considering it.