Tonight I tackled a task that has needed doing since I bought my motorhome last spring. The oil seal on the curbside rear axle has been dripping(very slowly) gear oil and making a mess on the wheel, not to mention the smell. I assumed it was going to be a difficult fix, I was suprised. The PO had used some type of gasket in a tube to seal this when he put it back together after doing the rear brakes. I pulled the plate and cleaned the gasket goop off, and tried to reinstall without any gasket. (Peter, there were no ridges??) Still leaks, so I went to the Auto parts store and got a $4.59 roll of gasket material and cut one to fit and installed it. (Fred, add this one to your list) No more leak and the greasy wheel is now clean and shiney!
The jist of this is that so far this has been the leat expensive repair to date! We all try to get a good deal, so lets compare notes. What has been the least expensive repair that you have done/had done that you thought was going to be difficult or big $$.
This is not a contest so I declare light bulb replacement a waste of bandwidth