Micro-flites were the top of the line fiberglass arrow of the day. Like most fiberglass arrows, they were susceptible to having the point driven back into the shaft, splitting it, on hard hits. Most of us never thought about footing them back then like many do with carbons now. I'm sure that would have stopped the splitting problem. They're generally heavier than carbons, quite comparable to wood in weight.
For the most part, they're not collector items, though there may be a few folks around who collect them. I shoot mine.