Question: I just uploaded my application in the market, but I'm not able to purchase it (it's a pay app).

I saw [here](http://market.android.com/support/bin/answer.py?hl=en&answer=141659) that it seems to be *made by design*, but then why the error message is `Server Error try again` ?

Is there a way to bypass that ?

Answer: 
Do you have an Android Developer Phone? If so, you can't purchase your own app by design. Since ADPs are unlocked, there's nothing preventing an ADP from easily pirating any app it downloads, so they are purposely cut off from downloading paid apps.
Yes, the Google account associated with your market seller account cannot purchase it's own apps. 

Personally I think this is a mistake on Google's part. I found some issues I couldn't solve until I had a market downloaded copy of my app - for some reason the debug version worked with the license service all the time, but downloaded ones didn't. I ended up buying it on my wife's phone.

Personally I wish I'd created a new Google account to use for selling my apps.