Worcester has a small community of agents who have been doing this for a long time, along with a small community of investors. They typically do everything off the MLS. It is great to bid up the price, but almost every offer is contingent on appraisal so even if someone offers $450k for a house that is worth $375k, it will still sell for $375k. Why go through all the trouble when everyone knows the final price. Also, most MLS offers have inspections and other contingencies. The good stuff sells for CASH with local lawyers on both sides of the transactions. If you watch the MLS you will see properties that go under agreement then back on a month later. This is typically related to either an inspection or an appraisal issue. Off market those are not issues for the most part.
As for delivering something vacant, that would be great, and I am seeing up to a 20% premium for vacant properties. In the past people wanted tenants, now everyone wants the place vacant which drives the price. There is a lot of money out there to help tenants pay back rent through various City,state and federal programs. The bigger issue is not people who are late in payment, but people who have been paying super low rents for years. There was a property this weekend, on the market for $400k with $2,350 a month in rent, $1200, $750,$550. Each unit should have been at $1500/month. How can you get someone paying $550/month to ever get to even $1300? it is not going to happen.
Best thing to do is try to get properties at a discount due to low rents, and wait them out. That is what the seasoned investors do. Don't get caught up in CAP rates, but focus on the LOCATION and QUALITY of the property and you will win long term.
I hope this helps.