The certificate for the BR 103 (Insider 2017 loco #1) finally arrived in the past week in the US.
Now I'm wondering what to do with it.

Is there any point in keeping it and if so, why? Does it add value to the locomotive itself on resale having this? Other than proving single owner, I don't see what value it serves.

Do others wallpaper their train room with these?

I keep in ring binder with clear punched plastic.

never had one myself.

Keeping it with the loco for later resale certainly wont lower the value of the loco, so just keep it rolled up in the box perhaps.

I keep mine. I don't think they add any value to the model though. I keep mine because I think it is a fun addition to owning an insider loco. Märkiln took the time to print it and send it, so why not.

If you like them, keep them. If you want to frame them and hang them on the wall, do so. Don't let anybody tell you that is wrong. If somebody wants to burn them, I hope they enjoy doing so.

Collecting stuff is all about what it does for YOU.

I guy I once knew had two Insider subscriptions, one for reading and using, the other one for storing all Insider communcation in prestine condition. Whatever makes your day. Unfortunately, he is not around anymore, but I can tell you that when his collection went on sale, the much work put into storing Märklin Insider communcation did not pay off (nor would I ever have expected it to). The point is, he enjoyed doing what he did, and that is worth more than anything.

I have a couple of files for my train stuff. Peter

1. General Maerklin correspondence and certificates.

2. Inventory

3. Current layout track plans printed from Wintrak software.

4. Dealer receipts going back to 1990. (yeah, I don't know why I kept them but I do).

I don't mind Marklin making some Insider specials, but they should also produce at least one version of each loco for general sale to everyone.

By all means make the Insider one special in some way, but it shouldn't be the only available model of that type of loco or wagon.

Over the years I have accumulated a few Insider models, mainly from eBay. I think they are very desirable, but they don't make the subscription good value in themselves, in my opinion.