How do you give people you TBT for items?

[Gabi<3AnimalCrossing]

I have been wondering forever since I find deal's I like but there for TBT and I don't know how to give people my tbt
Any one help?

And I have just notice that it says you instead of your sorry about that

 

[brutalitea]

Click

 

[Gabi<3AnimalCrossing]

Thanks for your help