The L400 has a somewhat unique shape, will your replacement fit without cutting up the door and patching?
L400s both working and not working sell routinely on ebay. Asking prices are not a good guide, as there is always someone asking a sky high price hoping to get it. Sold
prices are a much better guide.
They do sell at a substantial price, as this same lock was used on many vintage trailers, including Airstreams. So demand exceeds supply. I picked up one in nice condition on ebay as the seller had a lower buy it now price. If you see one at a nice (lower price), don't sit back and watch it, BUY IT!
I am a frequent seller on ebay as well. You won't believe the messages I get (hey, I was watching your item but I no longer see it.... buddy, it sold). For some reason, a lot of people wait thinking they will buy it later if they don't find an even better deal. When I tell them the item sold
, they often send a message: "Do you have another one?"
Ebay gives sellers a nationwide and even international market for their items. There is always someone out there looking for parts.
I also bought a repair kit, again, below typical price.
Sure enough, right now, the only one for sale
on ebay has an asking price of $800. Meanwhile, looking at sold items, several have sold for $300 to $380. $380 was a brand new old stock lock in original package.
If it is just the lock tumbler, I'd head to your local locksmith, I bet they can repair or replace it at a reasonable cost.