Try with couple of shops or go with known guys to trade in otherwise you'll be stripped there. I had a bitter experience with one Indian keralite shop keeper,  I showed him my Ericcson mobile + cordless telephone both for small repair works, he said come after 4 days, meantime I had to rush on vacation, when I returned back to collect, he said already someone collected on my behalf and he has no proof to whom he gave, very cunning guys. Be careful, but all the birds are not same.