Kicker Semi Sponsorship

I local shop is giving me a what they call a semi sponsorship... I call it a good deal... anyways

Its gonna consist of a 12" solobaric L7 or L5

my question is... what kicker amp should I be getting and what should I be paying for it...???

The shop said that the sub is about 350-400 (350 for the L5, 400 for the L7)

good deal???...

PS: this is in Canadian dollars, if your qouting american bucks just ler me know

thanks in advance