Do not use Ultra hids
I bought a pair and received them pretty quick - unfortunately one lasted 60 miles only. Needless to say I contacted him and explained the situation and asked for a refund. I wouldn't have normally gone straight for the refund but another member of another bmw forum that I use for 6 info was also having bother with him.
He was trying to get me to post them back at my expense which is against the sale of goods act anyway, then he wanted to send me some "upgraded" lights.
He emailed to say he would pay for return postage then said he wouldn't.
I declined again , then again and opened an ebay case. Ebay refunded me.
Why do sellers behave like that? I wouldn't do it and I don't know if he just expected me to give up or what.