I don't think they sold nobility in year 1223. His best chance to become a baron would be through military achievements. Purchase a horse, armor, weapons, become a knight. After a few military campaigns, if he is lucky, a king can grant him his land to control.
A baron in 1223 wouldn't exactly "go on adventures", he would have to control and defend his territory and provide military resources to his king, e.g. 20 knights for 40 days per year. Very expensive stuff. And he would have to manage bunch of rather dangerous people.
Sometimes barons were fighting between each other and even the king. Magna Carta was signed in 1215. The First Barons' War happened in 1215–1217.
Unless war is his idea of fun, the traveler should stay clear of nobility.
Selling any 21st century novelties would be very difficult, time consuming and dangerous quest in 1223. It would involve lots of traveling and negotiations with rich people who have almost unlimited power in their manors. The traveler is nobody. He speaks funny, clearly an outsider without roots, has an interesting suitcase. Robbing him is just an obviously good idea.
Spices were expensive, but it is a bulk product. http://medieval.ucdavis.edu/120D/Money.html:
Spices (cinnamon, cloves, mace, pepper, sugar, etc). 1-3s/lb
That's why they used ships to deliver them. In boatloads, not in suitcases.
Let's say the traveler has humongous suitcase, 750 liters (0.5 x 1 x 1.5 m). Spices tend to have density around 0.5 kg/l, so it's 375 kg or 827 pounds of spices. 2481 shilling, or 124 silver pounds. It is a good chunk of money but he is not a baron.
"Money" pound in 1223 was 323.7g of silver. 124 pounds at current 0.7 USD per gram would cost ~28k USD, weight about 40 kilo and have volume less then 4 liters. Easy to bury on arrival to avoid robbing, almost immediately useful.
28k is a noticeable sum, but if the traveler leaves for good, he probably can sell everything he owns. And get a short term loan from mafia.
Gold is way less profitable, it was many times cheaper relative to silver then now. And selling aluminum in year 1223 is a very complex and dangerous quest. No one knows what this stuff is and why they need it. You can't really make a good sword with it. The traveler would have to be a marketing genius to sell it with profit.
I'd say, forget spices, metals and trade goods in general. Get silver, as much as money allow, use the rest of space for stuff necessary in the past, like drugs and weapons. Don't bother with land and earning money in general, go on adventures right away.
Edit: For some reason I assumed the traveler is leaving for good, it appears the idea is to make multiple trips.
Noble metals are still the way to go. Gold was much cheaper relative to silver back then. Buy silver, go back in time, exchange silver to gold, back to the future, sell gold, repeat. High value density and ~800% profit per round trip.