If that is less than 1/3rd what your shares would be worth if you sold them as part of the funding round you're not getting fair value. You have to decide wheth

If that is less than 1/3rd what your shares would be worth if you sold them as part of the funding round you're not getting fair value. You have to decide whether you want fair value or not, but ~1/3rd the value of the shares in this funding round (assuming those investors got preferred shares, etc) is the low end. Investors in the round would probably buy your shares for 1/3rd - 2/3rds of their value and you should consider asking if that's an option and then negotiate from there. The only reason to let the company buyout your shares for a lowball offer is if you left the company after a short period of time without proper vesting and you want to do the right thing for the company's sake. Doesn't sound like that's the case.