I marked "because it looks cool" because well, it does!
But all of my equipment serves a purpose beyond "looking cool".
For example my remote line adds to the look and feel of a real gun but it also lightens the load on your arms and allows you to play tighter.
I love milsim because I can get that awesome tactical or realistic look but still performance in mind.
And if people tend to avoid milsim because all markers are "heavy" then you need to do some push ups.
I have no problem with running with a 13lbs setup all day and enjoy the fact that my setup actually has weight to it rather then a 4lbs setup.
Matters what you want out of it.
If you only want the marker then no, its a bad deal.
The mask is a horrible brass eagle mask too.
And why would you want more then 2 Co2 tanks?
I don't think its a good deal and I've seen much better offers
One of my friends who I go with has an Alpha Black Tactical and it works great.
Stock barrel is surprisingly accurate (so much so that I wouldn't even consider upgrading it) and the trigger isn't spongy like some 98s that I've used.
In the area of upgrades you can get any other stock that fits on a 98, an egrip, the cyclone, and thats about it. (why would you need more?)
And I agree on the on the weight statement, it is very light although my opinion is biased because my setup is usually around 12lbs.
polishing the internals will sort of help, but there wont be a very notciable difference except a little bit reduced 'kick' when you fire it, and some improved air effiency. Also, taking a dremel to the air hole in the ASA of the BT will help increase the air flow, I had to that to mine, and got almost 500 shots out of a 48/3000.
Actually polishing your internals will also lower your efficiency do to the increased dwell. Just a common misconception I wanted to clear up. Haven't explored the dremeling idea though.