Arduino BT

Hi
I want to perch on the Arduino BT, but I can find the actual price of the product.

what is Arduino BT, is that Bluetooth Shield?

I want to buy this
https://www.arduino.cc/en/Main/ArduinoBoardBT

What does 'perch on' mean?

Maybe you can just buy an HC-05 BT module for $3.00 USD?

yes an HC-05 is more than enough to establish Bluetooth communication.

I misspelled it :P. I want to perches on Arduino BT. Can you send me a link for that