Do you really think Nexus pays for their own guns. The only difference is the milling, the bolt, their own settings and a worse reg. And if you think that is worth £250 then so be it but given you can buy the bolt for less than £50, you already have a better reg and you can fiddle with the settings for free, that means £200 or more on milling.
I can just as easily buy a stock ego6, buy a nexus or dart bolt and fiddle with the settings and it will fire just as well as a nexus one.
Besides which I said IF they charge the same difference as last year if the difference is much smaller to account for the lack of not having a different frame then it is much more reasonable.
But either way you pay alot for the different milling and Nexus on side.