I have been a customer since they opened some 20 years ago.
I myself specialized in Classic US and worked for a couple other dealers through the years.
By far, they are the best in the stamp business as far as being 100% honest on every stamp sold wether valued at $1.00 to $5,000.00 +.
Also their prices are unreal as what you get per dollar spent, theres NO other stamp dealer that I am aware of that will be able to come close to their amazing prices !
Just a small sample of a couple sought after stamps that I have purchased from them is # 1and #2, along with MANY others through the years.
Airmails has been, two complete Graf Zeppleins on flown flight covers and a mint set as well as many Round The World and First Flight Zepp covers.
Also a good selection of Hindenburg First Flight flown covers.
Besides the huge amount of US Classic as well as Airmail stamps on hand, they also keep updated and sell all US stamps to date.
And if you're into foreign stamps, they also have on hand an unreal stock of most likely anything you're looking for.
They also handle stamp collecting accessories such as stamp tongs, water mark fluid as wall as anything else needed for the collector.
Robert, Leland, Paul & John are by far the most friendly and helpfull people I know of in the stamp world.
Very HIGHLY recommended by me as well as I feel comfortable saying anybody that also deals with them on a regular basis.
Give them a try and I guarentee you that you will never deal with anybody else !
I happen to be one of the lucky ones as I live about 28 miles from their large, three different speciality room stamp shop.
Many THANKS my friends at Collector Stamps LTD !
Ernie Julian
Charlestown, IN.