AUX on the cheap

Gents,

so my DVD player died some time ago, I will not bother taking it out and sending it in for repairs. As i started to listen to the radio more I noticed my radio reception is ridiculously poor. I am guessing the antenna connection ?

anyhow I need some recommendation for cheap Bluetooth and AUX options.
I am assuming I could run an AUX cable from the trunk, is there something to connect too? since im not using XM could i use its input channel?

are there any cheap Bluetooth adapters worth recommending? and by cheap I mean no where close to $100.00...

Thanks!