Wolfie, I got 5 domes for and the shipping was $8.05 priority mail - I ordered last night and today I got the email that it has been shipped. I could had for $7.49 if I wanted parcel ... but I wanted quicker so I opt for that...
I found the domes at $4.50 at Greenhouse Megastore but the shipping was way more expensive for me .... but maybe it would be cheaper for you... I actually like this company- all the heavy duty plastic I got for my veggie garden ...