In an Omega Constellation 300hz quartz watch…if the date wheel is broken, how much would it normally cost to repair it?

The wheel is in plastic and I’m not sure if they’re still made at all. We’re talking about a watch that gives the time super well but in which the date function got stuck in a number due to said wheel being broken and I am trying to evaluate if it’s worth acquiring and restoring it mostly because they’re quite rare

The seller says this issue with the date wheel is also very common in these watches so wouldn’t it also eventually just break again? The watch was created originally as an adaptation of the plain dial constellation quartz models that did not have any other functions besides time telling