NPP raw and deca raw are the exact same price.
retail, you pay more per mg of NPP though.
10ml 100mg/ml npp runs $50, 10ml 200mg/ml deca runs $50 (I dunno what other ugl's charge)
now, if you buy more than 1... like 3-5+, the price per bottle drops, obviously.. but if a guy is buying NPP, he'll usuaully buy more than 1 (usually 4+ at least), whereas they'll usually only pick up 2-3 deca at a time.
the profit on NPP is higher (much higher) than deca.
market determines the prices, remember. we'll charge whatever people are willing to pay.