That is one issue that always bugs me. People will get a super deal on a machine - and then gripe that they don't want to pay MORE for a shuttle/bobbin than they paid for the machine.
While it's something to consider when making a purchase, what you may pay for a machine and what you may pay for supplies are two separate deals, and often the cheaper the machine - the MORE expensive the accessories/supplies are if you don't get them with the machine. It is one reason Singers will often be near the same price with or without supplies, because they aren't expensive or hard to get.
Others - if it's missing cams, pedal, attachments, you'd better look around because it may be nothing but a parts machine - as the only way you are going to get those is to buy a machine with them. I've bought several machines because of the accessories they came with - as it was the cheapest way to get what I needed.