^^ Yup, I bought an RE1 from him 2 weeks back. Got it in a few days.
Also if you are interested I am selling my Yamaha HP-2 orthos in a week or so. I bought them for 6k from Titana and I am selling them for same amount (shipping included). They are 30 years old but are modded with damping on the drivers and the cable is changed to a Mogami mini quad cable. (By a head-fier and then by titana)
Its a fast headphone and sounds best with rock music and classical music (Violins, flutes and trumpents sound just amazing with Orthos !). The Sparrow should be able to drive them. Bass does not extend too low and stops around the 35 hz mark. Treble is nice and a strong point of the phones along with the mids. Audio-GD amps are slightly bright so you might face some sibilance. To counter this I EQ down the 10 khz band and the sibilance is gone.
Faheem has heard these headphones too so you can ask him about his opinion.