a good lipo charger for about 70 is the duratrax onyx 230 but you need a balancer also
[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXTCK1&P=ML]duratrax charger[/link]( price went up but its really good)
[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXMGS7&P=M]balancer[/link]
you could get this combo or you could buy something from hobbycity in china, they are very cheap
[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5549&Product_Name=IMAX_B 5_Balance_Charger_1-5_Cells]imax B5 charger/balancer[/link]
[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6879&Product_Name=16A_14 v_DC_Power_Supply_for_Chargers]power supply for the B5[/link]

both of these combos come to a little more than you wanted to spend but they are good reliable chargers, atleast the duratrax, only heard about the b5. Hope this helped