Vejam só esta Cassete num preço tão acessível.
http://www.ebay.com/itm/TDK-SA-X60-ET-Sealed-Blank-Cassette-Tape-Box-of-10-New-Old-Stock/281283133281?_trksid=p2047675.c100010.m2109&_trkparms=aid%3D555012%26algo%3DPW.MBE%26ao%3D1%26asc%3D20645%26meid%3D5533934026203170683%26pid%3D100010%26prg%3D9209%26rk%3D6%26rkt%3D24%26sd%3D331151088539