Wouldn't make sense.
Shipping is $10 from Zeal for 6-10 days, or $30 for 2-3 days. Say you buy 100 at $1 each, and get $30 shipping, that's $130.
Buying from you at $1.42 each would cost $142 + shipping (a small parcel next day in the UK is $9), so $151.
If you sell 100, you have to sell @ $1.21 (£0.94) each just to meet his prices, and I don't see that happening.