OKay, Fasttech users, help this user out! He needs an affordable 18650/21700 mod with boost capability.

I suggest the Alieno, which runs about 45.00 and has buck/boost, and a very capable, and long lasting chip, the Sevo 70.

Others should chime in, and you will have options. Good luck!

Also, if you like the Pico 2, get it! It's quite good, i own one myself. Small, 21700, good bottle, and yes, buck/boost. Very well built mod, a little heavy, and the 510 plate on some of them sit a little proud, but small issues overall!

EDIT: Or, if you mean non-squonk Picos, others will know better than me. they are quite popular at FT.