This sounds better to me:
I bought the Dell laptop not only because I found the price appealing, but also because I liked the fact that the laptop had an integrated webcam.
I just moved the 'not only' up front. This pretty much cascaded to all the other changes: not splitting up "but also," keeping the tenses more consistent ('I found' vs. 'did I find'), etc.
All the relevant information seems already to be in this thread, so this is "icing" on the pre-existing "cake".
The reason that "e.g." should introduce a list rather than terminate the giving of an example lies in the Latin itself. "exempli" = "(an) example", "gratia" = "for the sake of". The natural sense, then, is to supply a helpfulexample or examples (but not exhaustive list) for something just mentioned.
"For example" is a common gloss for the Latin "exempli gratia", but not a precise translation. "E.g.", then, shouldn't simply be used wherever "for example" can be used.
In short, and to cite the authority of Brian Garner, Garner's Modern American Usage (OUP, 2009), p. 295, "e.g. introduces representative examples" (emphasis added). One might add, by implication, "it doesn't conclude them".
Best Answer
Your sentence is grammatical, but not very idiomatic, at least in US English. My impression is that in ordinary speech:
In formal writing, you may put also just about anywhere, and you may put too immediately after the added element. You may put either at the head of the clause:
All of these displacements are very formal, however, and should be used sparingly: perhaps only when needed to point the structure of long propositions.