Greenway is OK. It's been under dosed to slightly under dosed. I've seen decent igf numbers with them and I've ordered several times. The last few shipment have tested higher than the initial shipment. IMO the last few shipments have been 8-9 uis per vial verses 6 in the first shipment.
Greenway's MK677 is good also. Their shipping is pretty much standard for sellers of raw products. Typically $40-50 per package with tracking.
Just so everyone knows, the pricing is volume based. You can't really negotiate the prices down substantially. If you want a better price then negotiate 5 kits as low as possible then ask for the price for 10 or more. The more you buy, the better the price. They don't care who you are or what you can "do" for them.