I don't think I've done bad for Atlanta - New York - Madrid - Athens - Istanbul - Milan - Barcelona - Madrid - New York - Atlanta :O
Atlanta - New York - Atlanta, Delta, Comfort+, 200 quid
New York - Madrid - New York, Iberia, business class, 84,000 Avios & 200 quid
Madrid - Athens, Iberia, business class, 15,000 Avios, 20 quid
Athens - Istanbul, Aegean, economy, 100 quid
Istanbul - Milan, Turkish, economy, 100 quid (Need to be in Milan for 3 days for business)
Milan - Barcelona, Singapore Airlines, economy, 100 quid (Back home via Barcelona to see friends)
Barcelona - Madrid, Train, 60 quid
Hotel Istanbul - Free on Hyatt Points
Before ticket and 'consumption' that's approx. 800 Quid (and some Avios). If I can max out at 1,500 quid including ticket and consumption, I'll be a happy chappy :D
Not sure what I'll go to for a ticket from the resale market, but I do have my limit.