"WGD"?
Did you get them shipped, and if so, mind sharing the shipping cost?
Another place is M&M (juicegrape.com) and they have frozen juice and frozen must (crushed grapes) all year long.
The frozen must from M&M or WGD are perfect for people who want to work with grapes out of season, don't want to mess with crushing, or don't have access to anything local to them geographically. Plus they give you a 6 gallon must every time, so it is entirely predictable and reliable.
For a red you would get a frozen pail of must; you could possibly reduce your cost by doing a double batch of red with (1) frozen must and (1) frozen juice. The toro negro cab sauv frozen grapes are $119.00. Their frozen cab sauv juice is $75.00. So you could do a 12 gallon batch for $194.00 + tax + shipping. That is pretty cost-effective. I would conferment and mix the juice and grapes together.
I did a batch similarly where I used (1) frozen must from M&M and (1) fresh juice pail from Chile. That worked out to be $119 + tax + shipping and $60 for the fresh pail (no shipping from Harford Vineyard). I cofermented the grapes and juice. The wine is really getting good now! A double batch is also a great way to beef up your back stock in your cellar.
So if you wanted to do a white you could just get a frozen pail of juice. Those are $75 to $150 + tax + shipping. It's an easy jump from a kit for someone who wants to make a white. Especially if you want to do a Chardonnay and take it through MLF, that can only be done with juice.
Anyone who makes this jump would need to have on hand the chemicals that are used in kits (yeast, kmeta, oak, sorbate only if back-sweetening), plus pectic enzyme, tartaric acid, clarifiers, tannins, and MLF culture. Testing supplies are also needed for at least pH and MLF, whether in the form of strips or a meter.
I know folks think that making wine from grapes is a more expensive route but I find the opposite to be true, especially when using fresh grapes and juice, and more so when using juice pail + lug of grapes for reds. I can make a batch of fresh white pail for $60 and a batch of fresh red for $115 with a pail + lug of grapes; that's two batches for the price of one high-end kit. Nothing beats the control I have over the process.
All-grape winemaking can be more expensive but it depends on the cost of your grapes. If you grow them or get a good deal, it could be super cheap. Plus there are wine kits that are $200+ for 6 gallons. When you get to that point, all-grape starts to look affordable. Cheap isn't the only measurement, anyway. The point is to make something enjoyable and that you are proud of.
I provide the costs just so that folks have a basis for making their own decisions - rather than an assumption that kits are the most affordable way to make grape wine. I find that not to be true.
They are certainly convenient and a good way to learn the process with controlled variables, and I still use them. But I am making the very most of fall and spring harvest, and just doing a few kits in the off season, now that I have access to fresh grapes and juice.
Best of luck!
Heather