A Wall Street analyst was haggled at a car dealership — and it left him wishing he had bought a Tesla

• Car dealerships are known for haggling and markups, especially in the era of short supply. 
• One Wall Street analyst recounted his recent efforts to buy a new truck that almost left him paying thousands above sticker price. 
• At Tesla, he said, the process would have been as easy as Amazon Prime. 

Longtime Tesla bull Adam Jonas went car…