I grew up in the car business and worked there as a teen...
What worked best for me was to introduce myself and ask if they needed any help.
If the person said they were just looking... I would give them my card and let them be.
Many have said they appreciated being greeted and then left browse on their own letting them decide if they wanted help.
Of course in the auto business every vehicle new and used had the price predominantly displayed... there was no guessing and no pressure.
I liked to move the front row inventory around... and would do weekend specials... might be a clean lower priced used vehicle along with a brand new vehicle... both usually sold.
We would get a lot of positive comments having prices on everything... the shop also had prices marked on accessories and their would always be a rebuilt/new motor on display and often a retired race car...
The frustration for me was tractor shopping... to say no response would be an understatement.
At the Deere Dealers there was no one to answer a single question... even a simple one as to when would be a good time to come back... the only people around would be the secretary who took my name and number and the guy behind the parts counter... I did not go into the backside where the shops are.
The local Kubota Dealer two counties over sold Kubota and New Holland... the yard was full of New Holland.. like a 100 tractors with a huge FORD sign and a small Kubota sign... by that time I was looking for a
BX23... the owner only wanted to sell New Holland... said he could make me a very good deal and have it serviced and delivered the next day within 50 miles...
I went back a year later and found they had dropped New Holland all together and were now exclusively Kubota.
Every Dealer tractor I bought... 2 new Kubota, 1 used CAT, 1 used Deere came with very good sales people. They were knowledgeable straightforward, able to quote a price and reachable.