Absolutely. I'd never bought or sold a block without either party knowing it is good to go.
Oh I had, back in the 70's & early 80's
a lot was
NOT used up junk "yet" though, or not on it's 4th rebuild, etc...
It didn't seem like so many people were scammers or shysters back then either...
Or I was just lucky (?)
Today, I'd never do it
without having it checked out or solid proof of it being sound/good,
especially used cast iron parts or any kind
&
the paperwork was verified, by the shop that did it,
w/receipts etc.
&/or a money back guarantee,
shipping back 'paid for', if it was bad
&
'in writing' w/signatures
a lot different dealing with people today
.
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.
.
.
.
.
.
.
Even on here,
I had a guy (won't name) I thought I knew well
he said;
"
he would buy, for sure" & he asked to save them parts for him"
(
like $2,100-$2500 value, for $1600 + 1/2 the shipping costs ($350),
& a few freebees, I was going to give him, I knew he wanted & needed)
He kept saying;
"he was waiting for a big check, but 'for sure', he wanted the parts,
that it was a done deal, please hold them for him"
all got boxed up packed nicely, for shipping, all got put on a crate & wait...
then he stiffed me,
I shouldn't have done it, being a nice guy, I got screwed, trusted his word
I should have known better, not like me, after I played his game for over 2 months...
I could have sold them 10 times over 'during that time',
to several different people...
& then He wanted do a '
friends & family deal, on PayPal',
so he could put them on his card, only way he could afford the parts/all NEW parts...
I think it was partially because he wanted to put it on his CC/he's broke
acted all like he had the $$$, all talk

, but doesn't/didn't actually have the $$
he couldn't afford to pay for them, or the check was never coming or something else (?)
I don't know...
Sorry but, I was having none of that, ever, 'karma's a bitch',
he got his in the long run, & it was nothing to do with me either...