Go out and decide which netbooks you want. It's much easier to get an answer when we can talk about specifics.
For example, I have an Acer Aspire One D255 which was sold with W7 and Android pre-installed - they were replaced without any problem with Slackware, Ubuntu etc....
Please note that I, and others, call it a netbook
whereas Acer describe it as a "notebook".
It has an Atom N550 processor - this is also important to know, because thats like a 686 processor whereas some of the netbooks you are referring to may have Arm processors - who knows?
So you see, you really must be more specific - though you could take the risk, if they're that
cheap. Linux can be installed on Arm processors, but that isn't straight forward or routine - again depending on which machine it is - RaspberryPi is also an Arm processor as are most smartphones.
It'll be your call - but first decide which machine tickles your fancy and then you'll probably get quite an enthusiastic response because then the techies will have more meat on the bone to chew