It's also the perfect combination of the two keywords with nothing else. You'll automatically be at a disadvantage.
But every large market typically has 1 leader and 1-3 other smaller companies who can survive. I doubt this is a large enough market where being #2 or #3 is going to be lucrative. You might as well find other niche premium vegetables. Like 1-800-Flowers and Harry & David (which the author mentioned) does...
https://www.wolfermans.com made a decent-sized business selling premium english muffins.
And someone was running the same business on it just before him: https://web.archive.org/web/19961215000000*/VidaliaOnions.co...
Good strategy. I've seen it suggested to check the wayback machine archive before buying a domain name to make sure you can recreate the same content and backlinks that already exist to take full advantage of any existing SEO.
I looked at doman name historical records and it said it was registered October 2008...which makes sense because that was the year after I graduated college to start my job in Middle Georgia (I'm a software engineer, if anyone knows that area you know who I worked for).
I visited my friend in NYC in September to watch the US Open, so makes sense that it was 2008 that I thought of it.
For those that are looking to replicate the success of this Vidalia Onion business only have a $10 budget for a domain here are some other options:
onlyvidalias.com
vidalias.net
tryvidalias.com
yummyonions.com
ordervidalias.com
buyvidalias.com
organicvidalias.com
vidaliafarm.com
allvidalias.com
simplyvidalias.com