I am going to answer even though I might be a little off and hope that one of the smarter posters corrects me and helps you. I think at one time, LBSR would use the figure $25,000. But I think they have since been willing to accept less. At one point, I thought I could scrape together $20,000 and they sounded willing, but I could not do it. But maybe you could do $10,000? The advantage is you get the shares at a discount; but you cannot sell them for a period of time. OK, smart posters, do your work!
p.s. I have said before that if I had $500,000 to invest, I would buy $200,000 worth on the open market and then do a $300,000 PP. I bet I'd make my money back quickly when thr PP was made public! If it is legal. It's like having insider information where I would actually be the one causing the insider info.