If you're selling something in a one-off transaction, you should try your best not to travel. There's exceptions -- plenty -- but most people are more willing to walk away if they haven't invested emotionally.
I just sold an office computer to a woman who wanted me to travel 70 minutes by rail to meet her, who'd negotiated quite hard and lengthily by email. I refused, and was ready to call it off. I knew once I got there, she'd probably lower her offer considerably.
A week later (yesterday), she traveled to see me, and only asked for 5% off, which was less than I was expecting and within the range I was already ready to do. If I'd traveled there, I could easily see her doing a "take it or leave it" at 20% lower than we'd negotiated, and leaving me having either wasted 3+ hours or taking less cash than was fair.
If it's a one-off sale with no relationship involved, try not to travel to meet the other side.
I saw this excellent blog post - "What a High School Student Learned from Paul Graham" - and I was really impressed with the author. He sounds like he's going to kick lots of ass.
I commented on his site, and I like how this comment turned out. Here you go -
Impressive, very good attitude. Godspeed in your endeavors.
A quick thought - don't wait for permission in any area of life. It's rarely that people will throw open the doors to you. Most forms of adventure and worthy causes and prestige can be walked into with a small amount of money as long as you're willing to try.
It costs maybe $500, max, to get a basic scubadiving license, and it's one of the most enjoyable things you'll ever do in your life.
Between parkour, facilitating for Startup Weekend, and a general desire to explore, I've had a lot of opportunities to travel the world. I’ve traveled solo and with friends, for business and for fun. I’ve traveled with people far more experienced than me, and people who have never left the country.
During my most March-April 2014 trip (Texas, Palestine, Israel, China), I started reflecting on my best travel experiences, my worst travel experiences, and why they turned out that way. The biggest realization I had is that I enjoy traveling with people a lot more than traveling alone. That led me to decided to start organizing a lot more trips with my friends.
One trick to traveling with friends, especially friends you haven’t traveled with before, is to establish expectations. That got me thinking about how what I would want to tell someone before we traveled together.
So, here it is. Zachary Cohn's Top 14 Rules for Traveling Adventures.