E420 "97" Key Locked won't turn

[Eastside]

I have a 98 e420 with a metal key, don't see any chips just tumbler cuts on each side. I have read several postings and i am still confused...can a above avg DIY fix this problem. I assume the switch needs replaced. talked to dealership they say 900.00 plus dollars 2 or 3 special tools,special cutting tool..... they said since it wont turn to on position they will have to cut it out, order new switch and keys(5 to 7 days to get keys cut)....crazy thing, i was trading car in for new hybrid next week...Can anybody help? I would like to get by long enough to trade