It depends on what u specifically promised the buyer when u sold the machine.
Everyone who sells a machine usually provides a warranty or some sort of repair promise etc. If not, then a no warranty scenairio is stated.
Either way, if sellers stick to what they have promised when a machine is sold, then there is no hassle. If the machine is sold without warranty, then thats also easy to handle.
If its not talked about at all (a warranty is not offered or even mentioned during the sale and or purchase by either party) then a seller would pick a period which is best suited to keep his name in good standing. A warranty should only be offered on brand new pinballs OR only on a fully restored machine which is shipped by a interstate truck company and not bounced to buggery in a 4 ft trailer over a 12 or 20 hour period. And that warranty should only be offered if u have somebody u know in that persons locality who can offer full servicing, otherwise none should be given.
Alot of people start playing with things and think they are experts and stuff things up. For this reason alone, warrantys should be very given sparingly, if at all, and only for the specific reasons (BNIB or fully restored) as mentioned above.
Anyone else agree ? lol