Donna, I use Kawamoto as well. Always a great experience. They offer free shipping so don't get too discouraged if the prices seem high. They ship ridiculously fast. Also, once you get your plant from them, you can email them with questions or concerns. They are always willing to help. Kawamoto has a website but they also sell on Amazon and eBay.
I also like Odom's orchids website. They are not on eBay or Amazon. They have a great variety and also always willing to help after a purchase.
If there is something on eBay that you like, maybe send us the link to see if one of us have had experiences with the seller.
I have bought off of eBay and it has been 50/50 for me. I try to avoid it unless I know the seller. I always look at the feedback first. Peterlin on eBay has been great.