Creasers are used in leathercraft to decorate the top of pockets with a single line. The manual creasers require to be heated with a flame and are quite cheap. The electric ones ensure a better heat control but are terribly expensive: one needs to consider about 400$ for a professional one. I don't understand the cost knowing this is nothing else than a power supply connected to a heating element.
Interestingly, most professional creasers use a tip which has a heating element embedded, which is very similar to a pyrographe I was using when I was a kid.
It turns out that Regad is the only brand of pyrograph which has this kind of handle able to host the tip with an embedded heating element. And they are quite cheap too: count about 9$ for the handle. Then any adjustable 12V DC power supply will do.
In total, I spent less than 140$ for everything, including various tips.
The handle itself is just an adapter that allows to screw on any compatible tip. There's no electronic control or temperature probe.
I bought a single handle (spare part of a REGAD 200) in an art shop as well as an adjustable power supply 3-12V 5A on Banggood. 2Amps should be enough but I doubt that a cheap power supply rated at 2A will deliver that so I'm aiming higher hoping to get 2-3Amps out