Well, Ritu, what do you know about houses? Do you know about construction, finishes, siting, the things that would affect value for two otherwise similar houses?
Do you know about the things that will affect the resale of the home, do you know what the upside potential would be for improvement or the downside of plans for the block?
To give you one example of a homeowner who boasted of the "steal" that they found on their own . . . it had an entry that was below grade on a street of houses with entries above grade. They didn't notice the privacy problem until after they'd moved in . . . and they didn't realize that homes with entries below grade were worth less anyway, so their "steal" wasn't really so much of one.
The reality is, you don't know what you don't know, and in order to catch up to, well, let's say, "me," you'd need to attend a three-digit number of inspections and have evaluated a large four-digit number of homes for the marketplace.
Aside from that, there's the knowledge of how transactions are customarily negotiated, from the contingency level through to closing . . .
Let's simply say that you're not going to be at an "advantage" without an agent.