Would you all do me a favor?

Hi everyone, Im Harry. This is my first post here. Been reading though the board for the last week. Im in a situation and could use some help from more experienced sellers. I'll keep it short. Here goes...

A few years ago I invested some money with my cousin to start a business. Long story short, my cousin did something dumb and it cost me my investment and the business never got started.

Its been dragged out long enough but Ive been talking to him about getting reimbursed since his actions ended up costing me. Without going into detail about what he did, Ill just say he owes me a little over 10k.

Here is where I could use some advice. Him and one of his other business partners were going to start a t shirt business from some t shirts they got from a tenant of theirs. The tenant faulted on his rent and got into a pretty large debt, tenant was taken to court, the court ruled he sell the merchandise to pay his debt. As a tradeoff, my cousin and his partner agreed to take the shirts as payment for what he owed.

The tenant was distributing mostly Bravado t shirts and other bands t shirts and merch. He had 10's of thousands of shirts, for the price my cousin and his partner got them, it sounded like a pretty good tradeoff.

They were going to sell the shirts themselves but things went rocky between them and they have other projects they are working on so they abandoned ship. They resold a lot of the shirts to other whoelsalers and distributors so its not like the shirts cannot be sold.

The shirts being offered to me are mostly official Led Zeppelin t shirts. Within the lot, there are some other bands such as Guns n Roses, Ramones, other punk and older rock bands. Theres also some Michael Jackson, Bullets for My Valentine, Lady Gaga, Eminem, and a few others but a very little amount. Most of it looks like licensed merch. A lot of the bulk of shirts I'd be getting are are in the top 100 selling t shirts on Amazon.

If I do accept his offer as reimbursement, I think I could sell the shirts myself. Im thinking to pen an online store and sell what I can to consumers, and maybe sell others to wholesalers and distributors. Put some on Amazon, eBay, etc. I have a little experience with e commerce but havent taken anything on of this scale. I know I would have a lot of work ahead of me if I tried to sell these shirts to recoup my initial investment from years back. But I think I could end up making much more than I initially invested back then. I know it'll probably be challenging but I think Im up for the task.

Most of the shirts sell for an avg of $20 from the research Ive done so far. At best, I could possibly sell 10,000 shirts for $20 each and make 200k. Worst case scenario I cannot sell them and end up with nothing but these lousy t shirts (maybe Ill start a 2nd t shirt business with that slogan if it fails, haha).

I guess what Im asking is if this is a fair deal and whether I should take it or not. Is there anything I should know before accepting? What would you do if you were me? My other option is continue negotiating a fair reimbursement but this offer is appealing because I can possibly triple or quadruple my initial investment. I have nowhere else to turn to for advice so any responses are greatly appreciated.

Thanks guys.