Maybe try Cryptopia they were listening coins for free in the past or for very low cost
There is Yobit nightmare but i think they will go down finally but i have been thinking the same years ago
There was pretty good exchange BleuTrade i don't know what is going on with them
There is many exchanges on this thread new ones witch one is enough legit that i don't know but i think thay are offering free listening
LiveCoin is even nice try there