There are more than enough small 'real' epublishers with whom one can publish a novelette tomorrow, and thus qualify to submit to oceanview.
Carina, Momentum, Alibi, Musa, Bloodbound, Wild Child, Uncial, Solstice, Musitup, Worldcastle, Rogue Phoenix Press - with all these a short thriller or mystery could happen, fast too. In fact - publish three 15K stories with three publishers, and you'll seem like a veteran. Everyone of the unagented crowd will view you a little less like yet another crank with a 'book concept' and a little more like someone who knows what he/she's talking about. IME