I'm also going to assume that, you're asking us for advice because you don't have the cash to pay a lawyer for a couple of hours of their time ;)
In this case, I suggest reading the OG literature: https://www.sec.gov/reportspubs/investor-publications/invest...
Find out if the state where your company is registered has rules that'll help you learn one way or another.
Personally, I think it's very fishy that a company would be allowed to sell a non-employee shares that they can't resell to someone else - I suspect that language in the options agreement is illegal.
Perhaps it is possible to sell your shares to the people "as is" - make it their problem, along with a full disclosure of the original options / stock sale agreement.
In any case, you'll need a competent lawyer's help in interpreting the options agreement, and the resale agreement, since the company is still private, so uhh... find the money to pay a lawyer.