on the site fg is as follows

$ 10 for 260 fg
$ 20 for 595 fg

im going to buy 15$ worth of habbo creds than trade you them for 15$ worth of fg id say around 400fg is fair for 75 habbo creds

get back to me im looking to get fg for my d2 account

sorry but your way out
10 creds = 10-15fg (avarge value on this site)
at the most your 75 creds is worth is 112.5fg
gl selling..

working out ratios on cash values never works out
look at other peaple's trades.