I checked Localbitcoins to return back the stuff but all the offers are in a lower price to sell, and to risky. Then confirm me that in LOCALBITCOINS there's no way to do anything.

In conclusion, The best could be buy a shittycoin and make profit and repeat the process all over again, the problem is that shittycoins don't have liquidity, and are risky, and it needs to be the arb oportunity between the 2 exchanges and some good excahgnes don't have shitcoins or weird altcoins.

So finally the best way is do the arb, wait weeks to spreads shrink, transfer with small loss, and repeat the process again and again.