I have a 240. Not much point in going beyond 250. Hopefully, there are some in the 240's out there.
As far as this challenge goes as an individual, I have found a 100/# which would complete my run to from 1/# to 100/#, but unfortunately, it is on COMC being sold by a big German Pippen collector, who always has MEM (or basically anything else) priced super high and this is no exception (he hardly ever replies on IG - I've been waiting for 6 months since he last sent me a message). I am looking 100/# on new listings, but it probably won't happen. A good way to finish would be a nice PMG red of Pippen 100/100