So earlier when I asked where the loan shark was to buy counterfeit monies, it was because I'm trying to generate some coin to purchase the witcher gear I sold to a couple of people so I could make space in my inventory(they're still holding onto my stuff). Thing is, buying my stuff back is expensive;I'd be out of crowns if I tried it.
Luckily, found a way to get crowns. Another exploit, a bit time consuming but screw it, I still haven't completed my first playthrough.
1. Go to a monster nest you haven't wrecked yet. Kill the enemies, drop a bomb in it, it goes boom. Then, pick up some of the items in the monster nest, but not all of them;you need at least one to remain. Then spin the camera around and loot again;the items you picked up before are back in the loot and you can get more. In my case I destroyed a harpy monster nest and looted their eggs, feathers, and talons.
2. Once you can't carry anymore of those items because the game says NO, go to the empty bottle merchant thats Northwest next to the beach in the middle island of Novigrad. Sell him as much of those items as you can as he buys them at full value. When he can't purchase anymore(which will be soon, he only carries so many crowns) buy all of his empty bottles. He replenishes his bottle supply instantly so you can keep buying bottles till you can't carry anymore, then sell as many of the monster nest items you picked up.
3. Head to the Loan Shark and sell him the empty bottles. You lose no crowns by buying and selling the bottles as they're always worth one crown a piece so you're only making a profit based on what you sold from the monster nests. Sell all the bottles you have to the Loan Shark, if you can't sell them all buy his florens which you can trade at the Vivaldi bank.
4. Repeat 2-4 until you've made massive profit gain.
I'll be doing this solely so I'm not broke when I get my items back to store them later. Anyway, cheers y'all.