1. The wife DOES occasionally do inventory in the garage, so don't get caught in a lie over how many machines you own.
2. Stripped, rotted out, non-rare parts sleds really are the best candidates for a full restoration. Even more so if the guy is asking running, restored money for it.
3. If you come across a sled you've never seen before, it must be RARE.
4. "Just needs a carburetor adjustment" or "Carb needs to be rebuilt" is code for "Needs an engine".
5. Everyone eventually owns at least one machine in which they invest far more than it'll ever be worth (Ahem...Wankel sleds). Accept it.
6. Never, EVER EVER EVER sell a favorite sled because someone offered you a stupid amount of money for it, thinking you'll get another one later. You'll end up searching for one forever (Mine: '95 Elan).
7. This one is just my opinion, but if you calculate restoration costs before purchasing a machine, you'll scare yourself out of the purchase every time. In my experience it'll get done eventually when time and money allow, so just have fun with it.
8. Every sled (or old vehicle for that matter) is a BARN FIND. Just like everything ran when it was parked, had all new parts put on just before it was parked, etc.
9. There are several kinds of vintage collectors: Guys that are in it for the thrill of the hunt, guys who like the restoration process best, guys that love to race, guys that love showing sleds, and guys that are in it for the money. Some of us are combinations of each, some are ALL of the above. All are good as long as you have fun with old sleds!
10. Unless you have money to burn, ever engage with a 'make me an offer I can't refuse' seller. You'll end up frustrated and will still probably walk away without the sled. If someone truly wants to sell a sled, they'll tell you how much, or at least give you an idea on where to start.
Your Privacy Choices