First thing, if you are new to VHF, you should stop over and read this article about Getting Started with a Basic VHF/UHF station.
Of course, hamfests are great places to get up and running at a discount. But it is handy to know where to go when you are ready to upgrade or buy new equipment to operate on more VHF bands.
Below are some pretty quality suppliers for VHF products.
This list is not completely exhaustive, but it will get you started if you are new to VHF:
Q5 Signal: http://www.q5signal.com/
- The Source for Down East Microwave VHF/UHF Transverters, Amplifiers, and Accessories
Directive Systems: https://directivesystems.com/
- Directive Systems & Engineering for VHF, UHF, Microwave Antennas and related products
ARR preamps: http://www.advancedreceiver.com
- High performance communications equipment
M2 antennas: https://www.m2inc.com/categories/amateur/antennas/vhf-uhf-microwave-antennas.html
- M2 antenna systems inc.