I bought 1 x ProPack RVP 100F, 120, for $39.40 with $2.80 postage. It was here in two days (though he misspelt my name; no harm done, I answer to most attempts!)
I would be very surprised if UPS actually delivers in 4-6 days. It is more likely 10 to 14 days historically. The known bottleneck is Customs: that's where the hold ups come from; we are all let down by the Customs folk, or deliveries would be very quick indeed (mind you, tidbits under $50 will go express without being seen by Customs).