If you decide to buy from HB, please see the bike in person and take someone along with you that knows what to look for (for your own safety). Contrary to what he advertises, he puts in minimal work, if any into the bikes. My bike came with the following:
Dented frame
Broken rear axle, later broken spoke due to all spokes being bent near hub flange next to freewheel
Poorly tensioned front wheel, later discovered bearings were shot and races severely pitted. For safety reasons, retired both wheels.
Worn out chain (stretched 1/8")
Your enthusiasm for vintage bicycles is understood but should be tempered with caution. An older bike, well kept is worth its price, a worn out one is not and at minimum can cost quite a bit to repair, at worst case can cost you life and limb.