Jeremiah,
I think it's best that you're honest with everyone you speak with. I live in a large market (Dallas/Fort Worth) and it seems like everyone knows everyone in the REI business. Most experienced investors will be able to tell that you're 'green' as soon as you call with the wholesale pitch... so I wouldn't try to mislead them and get a bad reputation. I get a couple calls a week from new wholesalers and I have yet to hear back from any of them with deals.
It's great that you're focusing on a buyers list but I also think you should start looking for deals. It will most likely take a lot longer to find a good deal. In my opinion, most new wholesalers underestimate the amount of TIME, MONEY, SKILL, and WORK that it takes to find a good deal. Build a marketing plan and get it in action ASAP... you can and should continue to build your buyers list while your search for your first deal.
I would love to get a call from a new wholesaler that was offering me a REAL (70% ARV less repairs) deal. I have not had the pleasure of getting a call like that but I'd take the caller much more serious than the rookie that watched the latest Than Merrill 'live' webinar. I may not be interested in the deal but I'd definitely take note of the caller and make an attempt to meet with him.
Real wholesalers are hard to find and good deals are what separates the wanna-be's from the guys making money.