The couple of times when I did find a good deal, the people selling it just didn't freaking respond to my questions about the item, the most recent example is I found on Offer Up a listing for a Traxxas Ford F-150 Slash for $100, with a NiMH battery (no charger or body clips). The listing was up for like 6 years, I asked them if it was avalible, and if it worked, no reply whatsoever, to this day (a couple of months later) not sure if it's already sold and they didn't bother to mark it sold, or what! (the guy is active, it's not like he's been off the site for years)
Nice of your wife to get you that stuff! Seems like she supports your hobby (always a good thing!), judging by what people are saying, you'll need all the tires you can get!