If the company is private then employees exercising options generally (always?) have clauses that restrict them from selling that stock whether they are accredited investors or not. Not a lawyer, but I think there may be two reasons: 1) prevent covert takeover from the original founders 2) prevent a general market for private companies (before IPO). IPO involves a lot of regulatory overhead to confirm full disclosure. I think the restriction is to maintain control, but it may be a legal requirement before public market.
In other words you can't sell except as part of a board approved sale of the company or a public offering. I think opportunities to buy are based on new issuance of stock (for accredited investors) not based on trades of existing stock.
In other words you can't sell except as part of a board approved sale of the company or a public offering. I think opportunities to buy are based on new issuance of stock (for accredited investors) not based on trades of existing stock.