We could decide on a collective offer per share? We probably wouldn't be able to match every offer to buy/sell (since apparently 3 times the investment amount has already been offered) but if we can include most of them, trading would at least be less effort in administration and still make most people happy. Having a smaller number of investors in total probably makes things easier overall.

I would not be against offering a somewhat larger amount (though not double) than the actual amount invested as a compensation.