don't spend too much... these harvard things are just large toys and people often give them away cause the men break too often... You can have some fun, but just don't get too invested; It is a dead end.
Any serious player will tell you to at least buy a shelti, tornado, fireball, dynamo, or even a TS if you are going to spend money. On any table the rods need to be matched by the fastener type and size, rod length, men spacing, and rod diameter. This is beyond the basic 5/8" diameter, rod weight, and finish.
Have fun, but remember it is a fragile toy you have!!!