Is This A Good Price

[MTX J30]

i currently have two mtx thunderpros. i wanna add more to my system. is this a good price for this sub. how many rms do you think its is. because im wondering if i would have to buy another amp. http://cgi.ebay.com/New-Old-School-MTX-THU...p3286.m20.l1116

[cartunez2004]

i currently have two mtx thunderpros. i wanna add more to my system. is this a good price for this sub. how many rms do you think its is. because im wondering if i would have to buy another amp. http://cgi.ebay.com/New-Old-School-MTX-THU...p3286.m20.l1116

u could prob find a better sub on here for that price that sub says 500watts so its prob 250rms

[MTX J30]

u could prob find a better sub on here for that price that sub says 500watts so its prob 250rms

i already have two of those subs and i know that it is bad to mix subs. so instead of starting a new system i thought i would just add on to the one i have w/ 1 more sub and a better amp. what do you think i should do.

[MTX J30]

if i did buy that sub i would have 3 of them. what would be the best amp to get.( i dont mind if its used or from ebay) i would also have to build my own box.