In this thread it is said that a near-50% MgS would run around 9 million. I am not sure where that figure came from, but it is inaccurate.
My MgS (just insta'd from GL) has a net worth of 3.4 million. To upgrade to only +44 would cost 7.8 million at the smith. That means a +44 MgS is worth around 11 million.
The bump from +43 to +44 costs around 1.8 million. So, just using an even 2 million as the upgrade cost for the next five bumps (probably a lot more than that) would add another 10 million.
Considering the exponential nature of upgrade curves (but being too lazy to actually use Excel to make a better guess), I would venture to say that a +49 MgS would have a net worth in the range of 25-30 million.
That's just a wee bit more that 9 million. *smile* I think I will just shoot for an even 40 for now. *laugh*