Yup, I do.

If you have two reservations for Biz Class tickets (so we're probably talking about a minimum of 80k mile tickets) and need 20k more MR points for the redemption, then I don't think $500 is terribly expensive.

I've said before here on FT that miles have a marginal value that is often overlooked. 20k MR points may only typically be worth $300 (to use a pretty conservative value I think), but if you need 20k more to reach a certain threshold for a specific award you desire, those last 20k points become more valuable in essence. To take the analogy to an extreme, say you're 1,000 MR points short of a 100,000 point Biz Class award, Do you think $25.00 is expensive for those last 1,000 points? Of course at some point it does become "expensive" if you're buying a large percentage of the points needed for an award, but in this situation that does not appear to be the case since it is a Biz Class award.