Not a bad idea! I noticed something similar last month when I was putting together my summer Europe trip. I was thinking of booking a Danube bike tour, and travel agents were giving me quote of well over $3000 per person for JUST flight, accommodations during the tour (six days), and bike rentals for the week - not including the three extra nights I was wanting to add on in Vienna and Budapest, or even any meals! I ended up just putting the whole thing together myself, ditched the bike part but added two extra countries, trains, and an extra week, and will be coming in at around $1800-$1900 per person for flights, hotels/apartments, trains, buses, and taxes or two weeks of travel all around Europe. It's amazing what the markup on those things is.