Burned by Apex Seals

So i purchased an rx8 last summer and loved it! But now the compression is low and I cannot get the car to start up when warm. A rebuild kit will run me about $1400 and I have a guy that wants to buy it off me for $2750. In good condition it will run about $5500. It's a 2005 rx8.



What are your thoughts? Should I take the hit and sell it or rebuild it?



Thanks for the advice.