Just a heads up that Elderly Instruments had (and may still have) great prices on these. Each set is $31 but if you buy two they drop to $28 PLUS free shipping over $49 or something like that.
I ordered two sets.
That's a good deal. I see Elderly has dropped the price on most of the DTB flats and tapewounds to $31 ea. or $28.80 each for two.