WOW! I had two of these back in the day. AAAAHHHH, memories. I bet alot of these younger kids are probably wondering what is that? My only response, it's OLD SCHOOL TECH.
I see there was a question of activation. By doing an internet search on 'PAGER ACTIVATE or ACTIVATION'. There is a bunch of companies that still activate pagers. Of course, most are 2nd and 3rd parties. I don't work for any of these companies, but a couple sites, that I saw on the internet for pager activation was: pager-world.com pagersdirect.net
There are a few others. My only suggestion to your buyers is check there rates before signing on. Some rates will vary. Hope that helps you out. Good luck with your auction.