Went to a garage sale and they were selling new lego sets for really cheap. I got a rebel U-wing set never been opened and also vaders tie fighter vs a wing starfighter. 

I had an idea to find more garage sales like this and sell the findings I get online. The lowest listings I can find online is 53.00 +10.00 shipping(ebay) for the first and 56.79 +free shipping (walmart) for the second.

Should I sell these on bricklink, ebay, or another form of storefront or if anyone here is interested let me know where you would like me list them, and if someone wants to negotiate a price I was thinking in the ballpark of 40.00 with 10 shipping. I don't really know how much lego sets cost to ship.

If you want to make a deal here. List them on Bricks Classified.
Are both unopened?