You really don't need fancy or expensive items for seedsowing. I have used about every container I can find, including the clear plastic that ground meat comes in. Just added drainage holes.
I have also used clear plastic shoeboxes purchased cheap at Walmart. Seeds don't care where they are sown as long as the container has drainage holes. Most important is the seed sowing mix.
I no longer sow seeds in a mix. I use the towel/baggies method, except for tiny seeds.
Below is a great item I purchased from Park Seed Co. a few years ago. It is 3 ft x 3ft and holds many potted seedlings once they outgrow my light fixtures. Comes with a shade cloth and zippered opening on both sides. Even with our strong winds, the 12" stakes kept it from blowing away. It folds up nicely to be stored in its own bag. I may put a heating cable in there this year so I can put the plants out earlier.