Scrub my previous comment about this being a friendly community.
What I meant was that out of the box (or whatever they arrived in), for example my plus and classic 2 don't have any network interfaces. It is possible to buy SE/30 ethernet cards, SCSI to ethernet adaptors, but what I am finding is that anything apple branded be it a mac plus mouse or an ethernet adaptor seems to command a premium on ebay (and ebay seems to be the only place to obtain vintage apple gear locally unfortunately, and not even counting the usual postage which internationally can be expensive).
Yes of course they can network, and if file transfers are frequent the most elegant solution.