They are going out of business and are selling their PLBs: prices vary based on the time of certified battery life remaining.
This is a great small business I've dealt with in the past. I just bought an ACR PLB with almost 4 years of certified battery life left on it for about 1/3 of what new ones cost. It's perfect timing for me since I have a (non solo) mostly off-trail trip in a very off-the-beaten-path and rugged Gore range area in a couple weeks, and am planning a lot of solo dayhiking and BPing this fall.
My wife sometimes rolls her eyes at my gear purchases, but she whole-heartedly endorsed this one.