---Some that come to mind? Homelite 150XL, Homelite XL2, Mini Macs, and etc.---
I'd personaly stay away from those rascals .Those are such a pain they could make a preacher cuss .
Some like the 10 series Macs you can still find parts for or doner saws to rob the parts .Keep in mind though that they are likely 30 plus years old ,rigid mounted engines and are loud enough to waken the dead .They run okay all things considered but because of the way they are constucted there is not much you can do as far as power enhancements if that's what you have in mind .Ha I've worked on so many of those saws I can nearly strip one down blind folded .