T34C, your requirement of under 100 PHRF is going to mean a boat closer to 40 foot if you are looking at boats from the 80s or early 90s. Look at the trend in Tartan 34 footers:
34C PHRF = 177
34-2 PHRF = 135
3400 PHRF = 102
If you want to keep the budget down and also keep the older 34-36 foot boats on your list, you will have to raise your PHRF number a bit. A boat with a rating of 115-135 is still going to be considerably quicker than what you have.