I use Sezzle as well. Especially for parts kits. It is also undectable pay source from banks knowing what you purchase. I am by no means putting these pay sources down I was just wondering if maybe that hiders sales on here to an extent. In other words a rifle on here priced at $500 is the same on PSA and I can do pay in 4 might persuade some folks.I've used Sezzle and have the app on my phone. It's one of the pay in 4 sites you were describing. I use it for PSA parts kits as well as PSA and Academy ammo deals. It's a good option to get what you want without loading up other cards.
But I still buy stuff here. Or I should say that I buy stuff from here that's priced realistically.