I'm pretty happy with my Canon LiDE220 for A$127. It is faster than the 110 which is why I paid a few extra bucks. Not that I scan a lot of things but slower would be annoying enough.

It does have some buttons to do auto scanning and printing but I haven't ever bothered with the Canon bloatware to make them work. Still needs a PC of course to do all that. Single USB connection so easy to move around.

I haven't seen a standalone networked scanner in my travels - always the all in one solutions.