New = $399 - less than a year old. 

Your price = $199

1 x JL Audio box (ported enclosure) with 6.5" micro sub. https://www.crutchfield.com/p_13616LW3V3/JL-Audio-CP106LG-W3v3.html?omnews=17171324

1 x R2-500X1 Rockford Fosgate Prime mono amplifier

New = $280 - https://www.amazon.com/s?k=rockford+fosgate+amplifier+mono&crid=3F45QE7OPQGO3&sprefix=rockford+fosgate+amplifier+mono%2Caps%2C107&ref=nb_sb_noss_1

Your price = $180

Total brand new:  $700+. 

Your total: $380

may have an extra fuse/fuse holder laying around somewhere. I'll throw them in the deal free.