Even if you buy seed they are so much cheaper than plants, save seed and they are free. You have to check they are not f1 plants if you want to save, you can get some strange results then, but even so some will probably come true like the parents. If you are taking side shoots from tomatoes put them in water and they will probably grow roots, with cuttings you know the genetics are constant, but of course some bought tomatoes may be grafted.
The mistake I most commonly see is people trying to save every seedling, grow four times as many as you need and then whittle them down to just the very best, strongest plants. Garden centres won't do that of course, they want to sell every one they can. Giving away the extras makes you popular, our village has a facebook page for just that.
My fig tree started out as a cutting taken off a tree in Egypt. a relative went there on leave in the navy about 60 years ago and a cutting was taken from a tree there, placed inside a book that had a few pages cut away inside. The book was soaked, wrapped up and sent home from aboard ship. That plant was planted in a tub in his mother's back yard where it took off and further cuttings were taken from that one and given to various family members.
The cutting I got here was already rooted when it was brought here, it took off pretty fast here but stayed within roughly a five foot circle or so, being cut back several times as well. It tends to try to grow to the east, putting down creeping roots and new shoots in that direction all the time. Its more a cluster of stems each year then a tree, it grows more like bamboo than a regular tree. This year was the first year where it got too tall to reach the top without a ladder, and it got to be over twelve feet wide.
It did something it never did before, it put on an early bloom of figs in late May, those turned and looked ripe despite being rock hard in a few weeks, I thought the hot/cold/hot cycles had screwed up its normal pattern but it dropped the first bloom and put on new growth and a new batch of figs that ripened in record speed before the end of August.
The normal pattern has always been that it runs a 5 year cycle, with the fifth year usually turning cold before the figs matured. The the next year it would start early giving me figs in July. Its never put on two blooms of figs like that before.
Once the figs were done around the end of August or so, the leaves started to turn dark and drop as it normally would do when the weather cooled off in October or so. Its been in its winter/dormant state now since the first week of September. It dropped its leaves, and the branches have died back as if it was the dead of winter.
Year to year its always died back to the ground unless I bury it in leaves and wrap it up. If I do all that it'll revive about half of its stems for the following year but lately our winters haven't been all that severe so I don't think its died back as far as usual through the winter.
I want to take some cuttings from it this spring to make a few more plants, I want one up closer to the house and figure its good insurance if something happens to the main tree.
I didn't put much value in it until this year, the figs were unusually sweet for some reason and I was able to pick more than I could eat every day it was in bloom.
I had so many I had to figure out how to preserve them and ended up with about 100 jars or so of fig preserves that I canned and refrigerated. I had to do something as I couldn't see them going to waste on the bush and I could only eat so many. All the neighbors here have had cuttings from this bush but I don't know how many survived over the years and I'm sure many got lost to landscaping changes by new owners. As it stands now I'm the oldest resident here being here most of my life, the none of the original owners who had planted clippings from this tree are still here. They were mostly my grandparents age and those folks passed on in the 70's and many houses have been through a half dozen owners since then.
With the pattern broken now, I'm not sure what to expect for next year. Its never gone into dormancy this early before, its also never dropped all its leaves right after a bloom either but the weather turned pretty quick there for a bit in August going from 90°+ to highs in the 60's and a few nights down to 45°.