I guess I can see there being some fun involved in doing that, but if I really needed Win98 for something I would just install it in a virtual machine. VMware Workstation/Fusion (Paid) or Oracle VirtualBox (free). There are a few others but they are more complicated to use.Probably the big question would be , can you come up with old part numbers for what your want or give specs on type of power plug in to the motherboard & power supply. I would worry about how long a used part will last you also. Most of the computers I used to build from scratch had parts go bad after 3 years. If you are trying to repair an older model computer , used parts may be a way to go. By the time you figure in shipping costs , it might be better to go on e-bay or Amazon to find what you are looking for.