I can find 10 and 20 round mags from many online sites for $30 or so plus about $11 ground shipping...........................I bought 3 30 round mags at my LGS at $ $32 each....They will order me 10 and 20 round mags for $35 each...........If I could find some one with a 10 or 20 round mag I would trade a 30 even or maybe add a few bucks to the trade....THis is for a Umarex (Walther) Colt C 4 22cal

The LGS and online kill me with such high shipping that takes at least two weeks as best to arrive.