Took break and now i think i suck

As in title i took 6 month break from game before the break i was gold 1 and dropped to gold 3 inactivity i think and then i played ranked i dropped to gold 5 and chnaged region now im silver 2 any idea? I'm looking forward to stop playing forever i think im going to sell my account it has all CS skins some season 3 skins all team skins etc. anyone know for how much my acc will go?