Why some random number domains cost so much?

[anasshm]

I was on dropcatch and saw domains like "15288.com" going for 1000$, why is that and is there a way I can learn how to value those number domains, thanks in advance

 

[Pazu]

Yeah, of course repeated 8s are the most valuable.

 

[lock]

If it hasn't been mentioned yet they were targeted too or used for contact addresses in ICQ chat domains to match the user number.

 

[INFJ]

It's not uncommon for those 5N names to be a contact # of some sort, or a messenger or payment address.