Somebody got a buy on your auction. There are five different chips with different insert colors on the $25 with the round NCV hotstamp; your blue has the highest value.

By the way, I think the Samarina seahorse chip is a fantasy. I've never been able to find a place or hotel by that name, but I do have it in my $20 chip collection [g].

The 50c Landmark hotstamp is a scarce first-issue chip; $200 in James' book, uncancelled. I haven't seen the chip before. It's in TCR valued at $75-100 even with the cancel!