First off, I don't think this is as profitable as it seems, since it is based on chance and upgrades are pricey... that said, this is just as assumption on my part and I'd be happy to be proven wrong.

Also, to Beardy's point, the best consoles in the game are not crafted ones, so it often takes a while for these things to sell (particularly, the high-end consoles)... but they *do* sell. I know, when I was trying the same thing, I let a couple of UR tac consoles go for the 1-2m range... but it took a while.

While I'm not trying to really do the math on it, where I'd start is:

~78 EC : 1 Dil (note 1)

From there, you need to know what you're investing in your consoles (include cost or cost of fabricating upgrades, dil cost, etc.)...

Here's how I'd crunch the numbers...

Cost of Mats for Console

+ Cost of Mats for Upgrade (or cost of Upgrade)

+ Dil Cost of Upgrade (*78 to convert to ECs)

Then, I'd multiply that by the total number of consoles and subtract that number (total EC cost of manufacturing) from the total gross revenue of selling the consoles (including the ones that stayed VR and/or UR)... divide that by the number of consoles and you have a rough bead on what your average profit is.

That said, these prices all vary a lot and it seems like a lot of work to figure out the profitability of something that I assume is marginal at best (when you factor in your 'failed' rarity upgrades)... so I'm not going to do the work, as mentioned above... but if someone else (eaglescoutdjb?) wants to crunch the numbers and it turns out to be profitable, I'm 100% on-board

note 1:

1 Zen ~= 240 Dil (rough current Dil Exchange price)

1 Key = 125 Zen = 30k Dil

1 Key = 2.35m ECs (rough current Exchange price)

30k Dil ~= 2.35m ECs

1 Dil ~= 78 ECs