How to sell omega items

It's not possible yet. Which, until they fix it, means that I cannot upgrade any more omega buildings because my storage is completely full of hoverboards and robot pets. Please fix this as soon as possible, EA!

Same issue. Can't expand anything because I can't sell the worthless items

"Instead of waiting until it is possible to sell Omega items, you can also ask the architect to design a new building. "

Now why didn't I think of that?  Fairly tedious process, but at least I've made some progress!

You can also build new residential Omega buildings and spend the Omega items on that. 

I've also noticed you can spend neosims in the neomall even if you've capped out, and if you spend simcash to finish canisters you can also go beyond the cap.

This is the SimCity BuildIt response:

Hey Mayor, thanks for getting in touch!

Omega items are useful items needed to upgrade your Omega residential buildings, which have higher number of residents living in them and therefore contributing greatly to your city population growth. Remember Mayor, Omega homes are the main source of your NeoSimoleons- needed for purchase of Omega items from NeoMall in case you don't have enough Omega items made in your Omega Research Center.

Omega items can not be sold in the Trade Depot or NeoMall, as they are specifically required for the Omega Zones/residential buildings.However, you will get an offer from other Mayors to sell your Omega items from time to time. Just tap on the bubbles with Omega items on top of your Omega Services buildings and your Future Cities advisor will tell you what your fellow mayor wants to buy. Tap I’ll do it! to accept or No thanks! to reject the sale.

There are total of 10 future themed Omega items (Robopet, Antigravity Boots, Ultrawave Oven, Jet Pack, Hoverboard, Solar panels, Cryofusion Chamber, Holoprojector, Telepod, 4D Printer) used for upgrading your Omega residential buildings.

Should you start to run out of space in your Omega Storage, Omega items come in handy here too, you can always expand it using Omega Items (or SimCash).

As the results of item research in Omega Research Center can be unpredicted and can vary, it can happen sometimes that your Omega Storage fills up with items that are currently not needed for your Omega building upgrades. No worries, Mayor, simply ask the architect to draw up a new building plan by tapping the blue 're-roll' icon in your Omega building site.

This way you should have no trouble and always find use for the Omega items you currently have!

Let us know if there's anything else we can help you with!

I just finished the omega challenge and was rewarded 5 pairs of boots. Now I have 9 pairs. I don't need 9. My storage is over booked and I can't get new items I actually need to expand.

FRUSTRATION IS BIG!

The expected EA response ... spend SimCash [= real money] to expand your storage.

Oh, they're clever.  Be careful, kids ... this is the REAL world.