I have used a couple of different brokers and have been very pleased with Carol @SES . She is friendly, knowledgeable, professional and she sends the semen right up to Alta Genetics which is a few hours from my place. Pretty hard to beat.
I also enjoyed doing business with Doug @ Rideauwood. He is very professional.
A few weeks ago I bought some semen from another broker because as far as I can tell there is nowhere else to buy this particular stallions semen. I was told it came in two MACRO straws and I double checked this as I had been warned about this broker already. It gets here this morning and one dose is actually two of the tiny micro straws ie 0.5 ml ! Broker claims to not know the difference between macro and micro straws. Broker did offer to refund my money but I would have to recharge the dry shipper and then ship the semen back out across the country and of course my mare is now coming into heat.