Why sell? So many PCP's for sale?
Well thats where its all happening. New to the sport, leaving the sport and upgrading within the sport.
A whole lot are buying and selling with enthusiasm.
Some is those who try, and enjoy, but not enjoy enough. Time, kit, expense, and that dreaded filling up the bottle thing goes against shooting PCP's. Big negative for youngsters is how to get that grownup to oversee so that they can shoot enough. Loads of barriers to hold people back or drop out of the sport. One huge problem is where to shoot, needs effort, and often transport???
Of those that stay, or are enjoying it all, then its upgrades and the search for the advantage. There always a sexier machine to be had. Or just for the fun of it. One big annoyance with PCP's is that they are easy to master and once mastered can get dull. (A bit like a 338 Lapua at 300m; how many times do you need to hit the spotting disc? Full bore can get boring to unless more challenging courses of fire found).
However, give credit to air rifle clubs as many are doing their best to make it fun and recruit more people and retain those they have. In general shooting a growing sport and loads of people are enjoying themselves. They might not all stay with air rifles but they will keep going with some other shooting sport; may well come back too.
Generally, a good amount of money is tied up in the kit. Those leaving, those upgrading, those buying into another shooting sport, all sorts of reasons then there is going to be a volume of trade. Think thats all we are seeing.
Its not because everyone suddenly want to go back to springers. Though loads do, as springers are more of a challenge in so many ways. But then have both. Think springers are getting a resurgence as there more tinkering and choice to be had, plus they aren't very forgiving for a challenge. Similar challenge to computer games with no cheats. We just love making things "interesting".
Anyhow, PCP's is where the action is. I don't own a PCP, never have, as they are annoyingly good, very.