Regardless of how "pricy" they are, are you:
1. In financial trouble (deep in debt, having trouble paying bills, etc.) because of your purchases?
2. Having trouble with daily life--think about guns constantly (when it is inappropriate, of course), are late to work because you are reading for sale ads?
If you answered no to either of the questions, you REALLY need to get serious about your collection--NEWBIE!!.
Seriously, if it is not causing troubles with either one of the above, you are probably fine.
AND, the Acura for SIG trade is a PRETTY DAMN GOOD TRADE!!. In 5 years, the Acura will be worth $2k, the SIG (barring any major law changes) worth $10K. I would trade something like that in a heartbeat, buy a beat up old shitbox of a car for $500 if I needed transportation, and be Grinning for weeks.
Oh, yeah--compare the next 2 years of insurance on the Acura vs. the insurance on the SIG.
It could be worse--my wife has over 300 Precious Moments figurines (including the 100 that she has stored that she doesn't think I know about--that's OK, as she hasn't seen my Barrett 82 yet). At $40-80 each, that adds up too, and I hate the little FU**ERS.