i think GSRs are the best selling basses cos of the IBANEZ brand and also the price. from what ive read and heard from mxtabs, harmony-central, talkbass.com, the GSR range is really good for the beginner level. thats why it sells. beginners want to get their hands on the first bass and they dont want sammicks or corts or sxs so they want something established and go for the ibanez range. thats how i see it.