Yeah, but if I were you, I would start at a low dose, because if you aim and hit your dosage too high, you're going to have to potentially wait weeks for the adverse effects to taper off before you can try again. I know this from personal experience because the sides of gyno lingered for weeks and it was annoying and unpleasant.
In the case where you wish to just dive right in and transition or go non-binary in presentation, you may as well take Janey's advice, but if you're looking to split the difference as I am, and get the best of both worlds while preserving your identity as a male, then you most certainly should slap on the training wheels instead of jumping on a Harley, if you know what I mean.
My only annoyance with the idea of buying it on ebay or amazon is the markup, I can technically get my estrogen gel covered if I go with my doctor and he accepts which I think he honestly will. But it all comes down to you, do you trust yourself? Do you know your body well enough? Because when it comes to hormones, nobody can tell you regardless of reference ranges what hormonal range feels "right". You need to determine that for yourself, so if you're willing and you feel you are genuinely able, then yes, try.
I would however start at less than a milligram in terms of dosing, but that's my plan, you must take into account everything you read here and be attentive to the counsel that all people provide on this forum because in the end you're the one in charge.
I will offer this though, if you feel like you're getting overloaded hormonally, buy some calcium d-glucarate, and/or some betaine hydrochloride, as one will hormonally flush you out (beware this means testosterone as well), and the other will help metabolize estrogen.
Good luck, and please report back.